What pesticide is used to clear a fish pond and kill all the fish?

With the rapid development of science and technology, many pesticides have also been developed and applied in various fields. There are specialized herbicides for weeding and specialized insecticides for killing insects. So what pesticide can be used to poison fish?

1. What pesticide can be used to poison fish

For poisoning fish with pesticides, derris extract is generally used, which is a concentrated component of rotenone. Rotenone is a ketone substance extracted from the roots of the aquatic plant derris, generally used as a pesticide. In agriculture it is a relatively safe drug, but when this substance acts on a fish pond, even a small amount can cause fish to die on a large scale, so it is generally used cautiously at the edge of fish ponds. Using this substance when clearing a fish pond gives a relatively good effect, as it can kill small miscellaneous fish and parasites in the water together, and the drug's effect generally disappears about 10 days after application.

In addition, it should be noted that pesticides should not be used to poison fish in wild waters or public drinking water, as this can easily cause poisoning that endangers public safety, and it will be prosecuted and punished as the crime of endangering public safety. According to legal provisions, whoever poisons or uses other dangerous methods to cause serious injury or death to another person, or causes major losses to public or private property, shall be sentenced to fixed-term imprisonment of not less than 10 years, life imprisonment, or death.

2. What is rotenone

Rotenone is essentially an insecticide found in the roots of plants of the legume genus Derris produced in tropical and subtropical regions of Asia. It is almost insoluble in water, but dissolves in ethanol, acetone, carbon tetrachloride, chloroform, ether and many other organic solvents. Agricultural pests controlled by this pesticide include aphids, planthoppers, striped flea beetles, moths, cabbage caterpillars, etc. This pesticide is highly specific and kills insects quickly, but it easily decomposes after its effect wears off. It is basically a pesticide harmless to the human body, but it should be noted that accidental ingestion can still cause poisoning, with damaging effects on the liver, kidneys, etc.

Although many kinds of fish will quickly float to the surface in a solution of rotenone at lethal concentration, if they are promptly transferred to a methylene salt solution at a concentration of 5-10 mg at this time, these fish will immediately recover their vitality. By applying this characteristic of rotenone, high-quality ornamental fish can be captured, and this method can sometimes also be used in certain scientific research.

The above is some relevant knowledge about poisoning fish with pesticides. When using this pesticide to poison fish, you should still pay attention to your own protection to avoid pesticide poisoning.